When i got this new one installed it went fine for 4 days playing Witcher 3 now suddenly my PC shuts off again. The issue happened with my previous PSU which was a CV650 at the time but people told me it wasnt strong enough to handle my i9-10900k and RTX 3080 so i bought the RM850x instead but the issues are still happening and it happens mostly when playing Witcher 3 and Alt-Tabbing out the game to browse the Internet etc...